# Man-in-the-middle attack in golang.org/x/crypto/ssh

Advisory record · `GHSA-xhjq-w7xm-p8qj`

- **Identifiers:** `GHSA-xhjq-w7xm-p8qj` · `CVE-2017-3204` · `GO-2020-0013`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Weakness (CWE):** [CWE-310](https://cwe.mitre.org/data/definitions/310.html)
- **Tags:** [CWE-310](https://agentprime.io/advisories/tag/cwe-310.md)
- **Published:** 14 Apr 2021
- **Updated:** 20 May 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 Apr 2021, 20:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `golang.org/x/crypto` (Go): affected `<0.0.0-20170330155735-e4e2799dd7aa`; fixed in `0.0.0-20170330155735-e4e2799dd7aa`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.032, the 88th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 14 Apr 2021. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-xhjq-w7xm-p8qj](https://github.com/advisories/GHSA-xhjq-w7xm-p8qj)
- [OSV: GHSA-xhjq-w7xm-p8qj](https://osv.dev/vulnerability/GHSA-xhjq-w7xm-p8qj)
- <https://go.dev/cl/38701>
- <https://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991>
- <https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-xhjq-w7xm-p8qj>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-xhjq-w7xm-p8qj/>. Everything for agents: <https://agentprime.io/llms.txt>.